{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "When the entire T lymphocyte population was considered , there were no differences between sensitivity groups with respect to the frequency of cells known to be responsive to TSST - 1 ( those bearing CD3 ( + ) V beta 2 ( + ) ) ."}
{"Chemical": []}